https://www.boeckler.de/pdf/p_imk_study_58_2018.pdf
https://ukandeu.ac.uk/what-sunaks-tax-return-tells-us-about-the-uk-tax-system/
https://www.ecb.europa.eu/press/key/date/2021/html/ecb.sp210226~ff6ad267d4.en.html
https://www.federalreserve.gov/newsevents/speech/files/powell20200827a.pdf